The Evidence for Single-Atom Ru Catalysts Supported on N-Doped Graphdiyne/γ-Graphyne Quantum Dots is Questionable

In a recent publication, Huang, Dionysiou, and co-workers claim the synthesis of single-atom Ru catalysts with unprecedent-ed metal loadings, attributed to the use of purportedly novel “N-doped graphdiyne/γ-graphyne quantum dot” supports. In this response, we critically evaluate the credibility of these claims and demonstrate that the reported synthetic pathways are implausible, and that the characterization data do not support the proposed structures of neither the supports nor the cata-lysts. We contend that the purported findings are scientifically unsound and call for a thorough reevaluation of the original work.